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What is a Chimney Chase Cover and How You Can Replace One?

A chase cover is a custom sized roof for your chimney that keeps it from leaking through rain or snow. A leaky, unsealed chimney is a lot like a leaky roof. Chase covers protect from rot, decomposition and long term home damage.

Your chimney needs a roof that is sealed from the weather. If you have an old, rusty chase cover, get ahead of the leaks! Fill out the form below and contact The Stove Shop in Phoenixville, PA today for a free custom chase cover estimate.

chase covers

Need a New Chimney Chase Cover Installation?

Get a Free Estimate from The Stove Shop in Phoenixville, PA Today

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LULU Scarpa
6 months ago
We are SO happy! Kevin came today and was very professional , knowledgeable and friendly! My husband and I are excited to finally be able to use our 17 year old fireplace again, Kevin did an awesome job! This was our first experience with the Stove Shop and definitely not the last, we will highly recommend these guys to everyone! Thanks guys!
Matt Campbell
6 months ago
I recently worked with Brandon at The Stove Shop in Phoenixville, and I can honestly say the experience was top-tier from start to finish. You don’t always expect true professionalism in a world of back-ordered parts and “we’ll be there sometime between sunrise and next Tuesday,” but Brandon sets a whole new standard. From the first conversation, it was clear he knows his stuff—and not in an “I’ve memorized the brochure” way, but in a calm, confident, I actually understand how this works way. I ended up going with a Heat & Glo SupremeX with birch logs and the greige interior, and Brandon made the whole process feel effortless. He walked me through every detail without ever overselling, answered all my questions, and made sure I understood exactly what to expect. He was accommodating with timing, followed up quickly, and had that “we’re going to get this right” attitude that you rarely see anymore. What really stands out is that he somehow manages to be both knowledgeable and genuinely funny—the kind of guy who can explain BTUs, venting clearances, and interior panel options while still keeping you laughing. It makes the whole experience lighter, faster, and a lot more enjoyable. But don’t let the humor fool you: the work was meticulous, and he clearly takes pride in doing things properly. If you’re considering a fireplace or stove upgrade, do yourself a favor and talk to Brandon. Between his expertise, professionalism, and personality, he turns a big home decision into a genuinely smooth experience. The Stove Shop is lucky to have him—and now I’m lucky to have a fireplace that looks incredible and works even better.
John LaFemina
4 months ago
Stove Shop installed a replacement gas fireplace/heater for an old unit in the home we just purchased. Most importantly, there were several serious safety issues with the old unit and we are grateful for the comprehensive inspection the Stove Shop folks did to identify those before something bad happened. The Stove Shop folks were able to recommend a economical replacement unit and did a wonderful job fixing the safety issues and installing a new unit. From the front line technicians to the back office staff, everyone we dealt with at the Stove Shop was kind, professional, knowledgeable, and focused on delivering outstanding customer service. I would, and will, do business with the Stove Shop again without hesitation and we strongly recommend them to you for all your fireplace and stove needs.
Scott Schultz
4 months ago
We want to thank the entire team at The Stove Shop for an extremely positive experience. This business is the epitome of a successful small business. Everyone we met -- three visits there before deciding what to purchase -- were knowledgeable, friendly and responsive. Special thanks to our sales rep, Jay, who was a pleasure to work with -- he made the decision-making process easy -- and our Installer, Erich, whose experience and expertise were unmatched. We highly recommend The Stove Shop!
Phyllis D’Antonio
3 months ago
We LOVE our new gas fireplace with heater fan ( replaced existing one ) !! From Alex in the show room to Ian ( surveyor ), Eric and Dan the installers and the ladies in customer service - everyone was great. Eric and Dan explained everything they were doing. They were neat, professional and efficient! We highly recommend the Stove Shop and we are glad we shopped around. The local place wanted to charge $1500 just to remove our old one 😡 , Stove Shop only charged $300. Thank you again to The Stove Shop!!

What Does a Chase Cover Flashing Do for a Chimney?

A chase cover’s purpose is straightforward:

  • Keeps rain, snow, and debris out of the chimney chase
  • Protects the wood structure from rot and mold
  • Keeps animals and insects out
  • Protects the factory-built chimney pipe and firestop assembly from rust
  • Directs water away using a drip edge and sloped design

How Long are Chimney Chase Covers Supposed to Last?

New homebuilders put this large metal pan on top of a fireplace chimney. (Often you will see a chase cover on prefabricated gas fireplace chimneys.) Over time, a chase cover will develop wear and tear. The age will show through rustlines and cracks in the metal. You should expect a pretty wide range depending on climate and roof pitch of 10-25 years in lifespan for a chimney chase cover flashing.

chase cover brick chimney

How Does a Chimney Chase Cover Work?

A chase cover works by creating a waterproof and weatherproof barrier over the entire top of the chimney chase. When properly installed, a chase cover prevents water from ever touching the chase structure or chimney components.

A correctly manufactured chase cover will have:

  • Cross-breaks (X-bends) to shed water
  • A raised collar around the chimney pipe
  • A storm collar sealed with high-temp silicone
  • A hemmed drip edge that extends past the chase walls
  • Correct clearances around the Class A chimney per manufacturer listing
chase cover chimney
Credit: Chimney Champions

What Does it Cost to Replace the Chase Flashing on a Chimney?

Prices vary based on chase size, roof height, and material. (Stainless steel is the standard because it resists corrosion and often carries a lifetime warranty.) Current price ranges for chimney chase cover replacement are:

  • 1-story homes: $800 – $1,300
  • 2-story homes: $900 – $1,700
  • Large / multi-flue / steep roof: $1,500 – $3,000+

Average chimney chase cover flashing replacement typically includes:

  1. Removal of the failing cover
  2. New stainless-steel chase cover
  3. New storm collar
  4. Sealing and termination inspection
double chase cover
Copperfield chase cover

How to find a certified professional to install a new chimney cover replacement?

We highly recommend National Fireplace Institute Certified professionals first and foremost. The Chimney Safety Institute of America and the National Chimney Sweep Guild are also invaluable resources in the hearth industry. 

No matter what you do, read reviews and get opinions from local residents in your hometown. While Google Reviews are useful, local fireplace shops are best represented by word of mouth from existing customers. Talk to your neighbors on Nextdoor and find out if they have any recommendations!

Mom relaxing in front of gas fireplace

What Are the Alternatives to Replacing a Damaged Chase Cover?

If the chase cover is rusting, sagging, or leaking, replacement is the only correct solution. There are no safe long-term alternatives to replacement.

Temporary “patching” with sealants or paints:

  • Does not stop internal rusting
  • Voids chimney warranties
  • Often traps water and accelerates damage
  • Is not compliant with NFPA 211

If significant water damage has already occurred, additional repairs may include:

  • Rebuilding the top of the chase
  • Replacing damaged trim, siding, or framing
  • Replacing rusted chimney pipe components
fireplace open dirty ready to be cleaned with tools nearby

Chimney Chase Cover Measurement Guide

Most homeowners prefer a professional to measure due to roof safety concerns and accuracy requirements.

  • Chase Width (left to right)
  • Chase Depth (front to back)
  • Chase Top Overhang
  • Flue Pipe Diameter(s)
  • Distance from flue center to each edge
  • Number of flues penetrating the cover
  • Roof pitch (for access and installation method)

Chase Cover Measurement Form Examples:

the stove shop storefront